Yin amfani da 40Cr ko 42CrMo azaman kayan tushe, madaidaicin ?ir?ira mara kyau yana jurewa, jujjuyawa, hobbing kayan aiki, carbonitriding, thermal insulation da tempering, ni?a mai kyau na da'irar ciki, da jerin magungunan hana tsatsa shine HRC58- HRC62, kyakkyawan aiki, da ingantattun ingantattun samfuran da aka gama.

Daban-daban na inganta ha?oran saman zane suna samuwa ga masu amfani da za a zabi daga: herringbone hakori irin, sa?ar zuma zagaye rami nau'in, rami madaidaiciya hakori hade irin, babban karkace helical hakori irin, talakawa madaidaiciyar hakori irin, kuma ta hanyar hakori irin.

Madaidaicin madaidaicin madaidaicin injin ni?a na'ura yana tabbatar da cewa da'irar ciki na abin nadi matsa lamba daidai yayi daidai da bearings na mai amfani, kazalika da bu?atun coaxial na da'irorin ciki da na waje na abin nadi.